If you are starting from Carshalton station, go down the hill to the right as you leave the station. Turn left into West Street at the bottom.
Continue along West Street, ignoring a cycle route to the left through West Street Lane. Stop opposite the Water Tower, which is on the right.
The house, now St Philomena's School, was built in the early 18th century by Edward Carleton, a tobacco merchant, who went bankrupt in 1713. In 1716 the house was bought by Sir John Fellowes of the South Sea Company, who himself went bankrupt in 1720 but by then he had laid out the grounds, employing landscape gardener Charles Bridgeman, and built the Water Tower or Waterhouse. As well as a cistern supplying water to the house, the Tower accommodated a large marble plunge bath, a pumping engine and an orangery. Carshalton Water Tower is open on summer Sunday afternoons (small entrance fee).